com.jiwhiz.web.config.WebConfigurer.java Source code

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Here is the source code for com.jiwhiz.web.config.WebConfigurer.java

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/* 
 * Copyright 2013-2015 JIWHIZ Consulting Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.jiwhiz.web.config;

import java.util.Arrays;
import java.util.EnumSet;

import javax.inject.Inject;
import javax.servlet.DispatcherType;
import javax.servlet.FilterRegistration;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;
import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
import org.springframework.boot.context.embedded.MimeMappings;
import org.springframework.boot.context.embedded.ServletContextInitializer;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;

import com.jiwhiz.web.filter.CachingHttpHeadersFilter;
import com.jiwhiz.web.filter.StaticResourcesProductionFilter;

/**
 * Configuration of web application with Servlet 3.0 APIs.
 */
@Configuration
public class WebConfigurer implements ServletContextInitializer, EmbeddedServletContainerCustomizer {

    private final Logger log = LoggerFactory.getLogger(WebConfigurer.class);

    @Inject
    private Environment env;

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        log.info("Web application configuration, using profiles: {}", Arrays.toString(env.getActiveProfiles()));
        EnumSet<DispatcherType> disps = EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD,
                DispatcherType.ASYNC);
        if (env.acceptsProfiles("prod")) {
            initCachingHttpHeadersFilter(servletContext, disps);
            initStaticResourcesProductionFilter(servletContext, disps);
        }
        log.info("Web application fully configured");
    }

    /**
     * Set up Mime types.
     */
    @Override
    public void customize(ConfigurableEmbeddedServletContainer container) {
        MimeMappings mappings = new MimeMappings(MimeMappings.DEFAULT);
        // IE issue, see https://github.com/jhipster/generator-jhipster/pull/711
        mappings.add("html", "text/html;charset=utf-8");
        // CloudFoundry issue, see https://github.com/cloudfoundry/gorouter/issues/64
        mappings.add("json", "text/html;charset=utf-8");
        container.setMimeMappings(mappings);
    }

    /**
     * Initializes the static resources production Filter.
     */
    private void initStaticResourcesProductionFilter(ServletContext servletContext, EnumSet<DispatcherType> disps) {

        log.debug("Registering static resources production Filter");
        FilterRegistration.Dynamic staticResourcesProductionFilter = servletContext
                .addFilter("staticResourcesProductionFilter", new StaticResourcesProductionFilter());

        staticResourcesProductionFilter.addMappingForUrlPatterns(disps, true, "/");
        staticResourcesProductionFilter.addMappingForUrlPatterns(disps, true, "/index.html");
        staticResourcesProductionFilter.addMappingForUrlPatterns(disps, true, "/images/*");
        staticResourcesProductionFilter.addMappingForUrlPatterns(disps, true, "/fonts/*");
        staticResourcesProductionFilter.addMappingForUrlPatterns(disps, true, "/scripts/*");
        staticResourcesProductionFilter.addMappingForUrlPatterns(disps, true, "/styles/*");
        staticResourcesProductionFilter.addMappingForUrlPatterns(disps, true, "/views/*");
        staticResourcesProductionFilter.setAsyncSupported(true);
    }

    /**
     * Initializes the cachig HTTP Headers Filter.
     */
    private void initCachingHttpHeadersFilter(ServletContext servletContext, EnumSet<DispatcherType> disps) {
        log.debug("Registering Caching HTTP Headers Filter");
        FilterRegistration.Dynamic cachingHttpHeadersFilter = servletContext.addFilter("cachingHttpHeadersFilter",
                new CachingHttpHeadersFilter());

        cachingHttpHeadersFilter.addMappingForUrlPatterns(disps, true, "/images/*");
        cachingHttpHeadersFilter.addMappingForUrlPatterns(disps, true, "/fonts/*");
        cachingHttpHeadersFilter.addMappingForUrlPatterns(disps, true, "/scripts/*");
        cachingHttpHeadersFilter.addMappingForUrlPatterns(disps, true, "/styles/*");
        cachingHttpHeadersFilter.setAsyncSupported(true);
    }

}